diff --git a/lib/tasks/migrate_from_mantis.rake b/lib/tasks/migrate_from_mantis.rake
index ffa84d4ea..800bb4085 100644
--- a/lib/tasks/migrate_from_mantis.rake
+++ b/lib/tasks/migrate_from_mantis.rake
@@ -119,7 +119,7 @@ task :migrate_from_mantis => :environment do
       has_many :members, :class_name => "MantisProjectUser", :foreign_key => :project_id
 
       def identifier
-        read_attribute(:name).gsub(/[^a-z0-9\-]+/, '-').slice(0, Project::IDENTIFIER_MAX_LENGTH)
+        read_attribute(:name).downcase.gsub(/[^a-z0-9\-]+/, '-').slice(0, Project::IDENTIFIER_MAX_LENGTH)
       end
     end